UPSKILL MATH PLUS
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Learn moreExpand each of the following, using suitable identities:
(i) \((x + 2y + 4z)^2=\)
(ii) \((2x − y + z)^2=\)
(iii) \((−2x + 3y + 2z)^2=\)
Answer variants:
\(4x^2 + 9y^2 + 4z^2 -12xy - 12yz– 8xz\)
\(x^2 + 4y^2 + 16z^2 + 4xy + 16yz + 8xz\)
\(4x^2 + y^2 + z^2 +4xy – 2yz -4xz\).
\(4x^2 + 9y^2 + 4z^2 – 12xy + 12yz– 8xz\)
\(4x^2 + y^2 + z^2 – 4xy – 2yz + 4xz\)
\(x^2 + 4y^2 + 16z^2 + 2xy + 8yz + 4xz\).
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